A T-Mobile store sign is seen in Broomfield, Colorado, in this February 25, 2014, file picture. Photo: Reuters

Amid T-Mobile US Inc.’s (NYSE:TMUS) impending merger with Sprint Corporation (NYSE:S), the network experienced a service outage Friday morning that affected thousands of subscribers across the country.

Down Detector discovered the outage at approximately 11 a.m. Friday morning, and by midday the website had more than 1,500 reports of service lapses in areas including Seattle, Dallas, Phoenix, Florida and especially along the East Coast. Users experiencing outages were unable to complete voice calls and heard a recorded message saying that the number being dialed was unavailable.

Reports indicate that the problem was largely with voice calls, but a few subscribers were also unable to use texting and data. Currently, it appears most service has been restored.

According to Android Authority, nearly every T-Mobile tower in the U.S. went down at some point during a two-hour span Friday morning.

Mobile carrier Metro PCS, which is owned by T-Mobile and serves metropolitan areas, also experienced service outages this morning during the same time period.

“The T-Mobile network team was able to quickly resolve call processing issues affecting some customers briefly this morning. We apologize to our customers for any inconvenience,” a T-Mobile spokesperson told the International Business Times. A precise cause for the outage was not indicated.

According to Down Detector, AT&T Inc. (NYSE:T) also experienced a service outage in the San Francisco Bay Area on June 3.